Neuronal connections of eye-dominance columns in the cat cerebral cortex after monocular deprivation

被引：4

作者：

Alekseenko S.V. ^{[1
]}

Toporova S.N. ^{[1
]}

Shkorbatova P.Yu. ^{[1
]}

机构：

[1] I. P. Pavlov Institute of Physiology, Russian Academy of Sciences, St. Petersburg 199034

来源：

Neuroscience and Behavioral Physiology | 2008年 / 38卷 / 7期

基金：

俄罗斯基础研究基金会;

关键词：

Cat; Eye dominance columns; Horizontal connections; Monocular deprivation; Visual cortex;

D O I：

10.1007/s11055-008-9031-4

中图分类号：

学科分类号：

摘要：

Plastic changes in intrahemisphere neuronal connections of the eye-dominance columns of cortical fields 17 and 18 were studied in monocularly deprived cats. The methodology consisted of microintophoretic administration of horseradish peroxidase into cortical columns and three-dimensional reconstruction of the areas of retrograde labeled cells. The eye dominance of columns was established, as were their coordinates in the projection of the visual field. In field 17, the horizontal connections of columns receiving inputs from the non-deprived eye via the crossed-over visual tracts were longer than the connections of the "non-crossed" columns of this eye and were longer than in normal conditions; the connections of the columns of the deprived eye were significantly reduced. Changes in the spatial organization of horizontal connections in field 17 were seen for the columns of the non-deprived eye (areas of labeled cells were rounder and the density of labeled cells in these areas were non-uniform). The longest horizontal connections in deprived cats were no longer than the lengths of these connections in cats with strabismus. It is suggested that the axon length of cells giving rise to the horizontal connections of cortical columns has a limit which is independent of visual stimulation during the critical period of development of the visual system. © Springer Science+Business Media, Inc. 2008.

引用

页码：669 / 675

页数：6

共 42 条

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